Current-induced torques and interfacial spin-orbit coupling

Handle URI:
http://hdl.handle.net/10754/552861
Title:
Current-induced torques and interfacial spin-orbit coupling
Authors:
Haney, Paul M.; Lee, Hyun-Woo; Lee, Kyung-Jin; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Stiles, M. D.
Abstract:
In bilayer systems consisting of an ultrathin ferromagnetic layer adjacent to a metal with strong spin-orbit coupling, an applied in-plane current induces torques on the magnetization. The torques that arise from spin-orbit coupling are of particular interest. Here we use first-principles methods to calculate the current-induced torque in a Pt-Co bilayer to help determine the underlying mechanism. We focus exclusively on the analog to the Rashba torque, and do not consider the spin Hall effect. The details of the torque depend strongly on the layer thicknesses and the interface structure, providing an explanation for the wide variation in results found by different groups. The torque depends on the magnetization direction in a way similar to that found for a simple Rashba model. Artificially turning off the exchange spin splitting and separately the spin-orbit coupling potential in the Pt shows that the primary source of the “fieldlike” torque is a proximate spin-orbit effect on the Co layer induced by the strong spin-orbit coupling in the Pt.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Current-induced torques and interfacial spin-orbit coupling 2013, 88 (21) Physical Review B
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
19-Dec-2013
DOI:
10.1103/PhysRevB.88.214417
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.88.214417
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHaney, Paul M.en
dc.contributor.authorLee, Hyun-Wooen
dc.contributor.authorLee, Kyung-Jinen
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorStiles, M. D.en
dc.date.accessioned2015-05-14T12:09:20Zen
dc.date.available2015-05-14T12:09:20Zen
dc.date.issued2013-12-19en
dc.identifier.citationCurrent-induced torques and interfacial spin-orbit coupling 2013, 88 (21) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.88.214417en
dc.identifier.urihttp://hdl.handle.net/10754/552861en
dc.description.abstractIn bilayer systems consisting of an ultrathin ferromagnetic layer adjacent to a metal with strong spin-orbit coupling, an applied in-plane current induces torques on the magnetization. The torques that arise from spin-orbit coupling are of particular interest. Here we use first-principles methods to calculate the current-induced torque in a Pt-Co bilayer to help determine the underlying mechanism. We focus exclusively on the analog to the Rashba torque, and do not consider the spin Hall effect. The details of the torque depend strongly on the layer thicknesses and the interface structure, providing an explanation for the wide variation in results found by different groups. The torque depends on the magnetization direction in a way similar to that found for a simple Rashba model. Artificially turning off the exchange spin splitting and separately the spin-orbit coupling potential in the Pt shows that the primary source of the “fieldlike” torque is a proximate spin-orbit effect on the Co layer induced by the strong spin-orbit coupling in the Pt.en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.88.214417en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleCurrent-induced torques and interfacial spin-orbit couplingen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCenter for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6202, USAen
dc.contributor.institutionDepartment of Physics, Pohang University of Science and Technology, Pohang, 790-784, Koreaen
dc.contributor.institutionDepartment of Materials & Engineering, Korea University, Seoul 136-701, Koreaen
dc.contributor.institutionKU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Koreaen
dc.contributor.institutionUniveristy of Maryland, Maryland Nanocenter, College Park, Maryland 20742 USAen
kaust.authorManchon, Aurelienen
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